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The Punnett_Monkey is a Java program written by Harrell Lee Sellers. The author retains copyright.

Just choose the genes for the male and female parents by clicking the buttons. You will click through a list of chicken genes in the order in which they appear in the tables of genes. You must select two genes for each parent and the genes should be for the same trait. The sex-linked genes are first in the gene list. If you choose a sex-linked gene for the female, you must select the dash, -, for the other female gene. The plus sign indicates the wild-type gene. The 'hat' or shift-6 indicates a superscript.

Just try it! Select the four genes! If you make a mistake, just press your refresh button and start over. If you get tired of clicking through the gene list, please try the "Advanced" Punnett_Monkey. The "advanced" Punnett_Monkey will do the Punnett square for up to 4 simultaneous traits and give percentages, and you choose the genes you want by selecting them from a table.

Now all you have to do is click on the Do Punnett Square button. The genes are separated by a slash, which is a common notation. I use the dash notation to represent the female sex-chromosome, the W chromosome. I don't use 'W' as some people do because 'W' is also a gene symbol and that can be confusing. Separating the gene symbols with a slash then avoids having to write genotypes like b+- (it would be written here as b+ / -).

The gene combinations you will have in your chicks are shown in the blue 'quadrants' of the Punnett square. Each one of the four quadrants represents 25% of the chicks. If some of the gene pairs are the same (the order of writing the genes in the gene pairs makes no difference), then add the two percentages together.

Try making a sex-link bird! Breed a red male to a silver female. Give the female the genes S and - (dash) and give the male two gold genes, s+. The chicks that inherit the dash are the females! What color are the males and females in this cross? Now turn it around. Mate a red female (genes s+ and dash) with a silver male (two S genes). What color are the male and female chicks now?